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MAIL Routines, MAIL$MAILFILE_OPEN
 *Conan The Librarian 

    Opens a specified mail file for processing. You must use this
    routine to open a mail file before you can do either of the
    following:

    o  Call any mail file routines to manipulate mail files

    o  Call message routines to read messages from the specified mail
       file

    Format

      MAIL$MAILFILE_OPEN  context ,in_item_list ,out_item_list

  Additional Information (explode) :

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